DC1663A

DC1663A is a demonstration circuit that features LTM®4628EV, high-efficiency, high-density, dual 8A output, switch mode step-down power module. The output current derating is necessary for certain VIN, VOUT, thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE jumper (JP1) selects pulse-skipping mode for noise-sensitive applications or Burst Mode® operation in less noise-sensitive applications. The DC1663A sets LTM4628EV default switching frequency to 400KHz; however frequency is resistor programmable from 250KHz to 780KHz. An internal phase-lock loop allows the module to be synchronized to an external clock. The board allows user to program how its output ramps up and down through TRACK/SS pin. The output can be set up to either coincidentally or ratio metrically track with another supply’s O/P. Remote output voltage sensing is available for improved output voltage regulation at load point.

• Input voltage range from 4.5V to 26.5V
• Output voltage is programmable from 0.6V to 5.5V
• LTM4628EV in a compact 15mm × 15mm × 4.32mm LGA package